Box panel stiffener for wall panel system



FIG. 1 is a perspective view of a box panel stiffener for wall panelsystem showing our new design.

FIG. 2 is a front plan view thereof.

FIG. 3 is a rear plan view thereof.

FIG. 4 is a left side elevation view thereof.

FIG. 5 is a right side elevation view thereof.

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The article is shown with a symbolic break in its length. The appearanceof any portion of the article between the break lines forms no part ofthe claimed design.

CLAIM The ornamental design for a box panel stiffener for wall panelsystem, as shown and described.